利用数据融合技术提升输电线路故障定位精度的新方法

发布时间：2018-11-02 08:50

【摘要】：输电线路故障的快速准确定位对于电力系统的安全运行具有重要的意义。目前,不同的故障定位原理被广泛地应用于电力系统的变电站中,由于其在故障后所给出的故障位置并不一致,运维检修人员对相互冲突的测距结果无所适从,影响了故障的快速恢复。该文利用输电线路两端变电站中距离继电器的测距结果,基于多源数据融合技术,提出一种提升输电线路故障定位精度的新方法,该方法利用线路两端距离继电器的测距结果和故障录波装置中的电气量数据,采用加权系数的数据融合方法,通过解析求解,对两端距离继电器的测距结果进行数据融合来获得一个精度更高的定位结果。电磁暂态仿真和现场录波数据验证了所提出方法的有效性,结果表明,该方法能够基于变电站现有信息提高故障定位精度,无需额外的设备投资,无需数据同步,不受过渡电阻、负荷电流和故障初始角度的影响,具有良好的经济性和实用性。
[Abstract]:The fast and accurate location of transmission line faults is of great significance to the safe operation of power system. At present, different fault location principles are widely used in substation of power system. Because the fault location is not consistent after the fault, the operator and maintainers are at a loss to the conflicting location results. Affects the fast recovery of the fault. Based on multi-source data fusion technology, a new method to improve the accuracy of fault location of transmission lines is proposed based on the location results of the distance relays in the substation at both ends of the transmission line. In this method, the location results of the distance relays at both ends of the line and the electrical data in the fault recording device are used, and the weighted coefficient data fusion method is used to solve the problem analytically. The distance measurement results of the two end distance relays are fused to obtain a more accurate location result. The effectiveness of the proposed method is verified by electromagnetic transient simulation and field recording data. The results show that the proposed method can improve the fault location accuracy based on the existing substation information without additional equipment investment and data synchronization. It is not affected by transition resistance, load current and fault initial angle, so it has good economy and practicability.
【作者单位】：陕西省智能电网重点实验室(西安交通大学电气工程学院);国网四川省电力公司电力科学研究院;
【基金】：国家重点研发计划项目(2016YFB0900603)~~
【分类号】：TM75

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